Gas-burner.



J. G. STEENSON.

GAS BURNER.

APPLICATION FILED MAR. 29. I915.

Patented May 22,1917.

w M w MEME #m m 7 l Jnssn e. srnnnson, or MINNEAPOLIS, MINNESOTA.

'1 ball whom-timely concern;

Be it known that I, Jnsss G. STEENSON,

citizen of the United States, resident of Minneapolis, county of Hennepin, State of Minnesota, have invented certain new and useful Improvements in Gas-Burners, of which the following is a specification.

It sometimes happens that. the flame of a gas burner will be blown out by draft of air or by someone unfamiliar with devices of this kind and an explosion or asphyxia tion may result.

The object of invention is provide a;

gas burner having means for locking the controlling valve in an open position whenthe gas'is lighted and releasing the valve to allow it to close and shut ofli the gas when, for any reason, the flame becomes ext1n .guished, or in case the gasshould not be ignited when turned on. g V

A further object is to providea'burner having a valve which can be manually closed to shut ofi the gas independently of the auto-, matic' attachment. w

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying part of this specification,

Figure 1 isan elevation of a burner, em-

, bodying my invention, showing the parts in their normal in use, v p g V Fig. 2 1s a simllar view, showing the valve position when the burner is not open and the position assumed by-the parts,v

when the gas is lighted,

Fig. 3 is a view, partially in section, looking at the burner at right angles substantially to Fig. 2,

Figs. 1 and 5 are detail views, illustrating anextension provided on one end of the thermostatic bar.

In the drawing, 2 represents a' burner,

having a suitable tip 8' and a valve i, of orf dinary construction. This valve is provided with a lever 5 which may be operated by the fingers or by suitable means. An arm 6 is loosely mounted on the stem of the valve and is provided with a coiled spring 7 which nor mally holds the said arm in'theraised posi tion indicated in Fig. 1. A lug 8 is formed on said arm and projects outwardly into the path ofthe1ever5 and is provided with a arm of the-lever set screw 9' to engage, one for forcing the arm 6 downwardly when the Specification of Letters Iatent.

of the bar s drawings forming GAS-BURNER. 1

Patented May 22, 1917.

Application filed March 29, 1915. Serial No. 17,687.

leveris rocked to open the valve. A lug 10 is also provided on the arm fi, having a shoulder 11in position to engage an extension 12 slidably mounted on one end 13 of a thermostatic bar 1 1 that is mounted at 15 on the burner and has a looped end 16 terminating in the extension 13 that is bent at right angles substantially to the main portion of the bar. This thermostatic bar, as usual in devices of this kind, is composed of two kinds of metal, one having a greater degree .of expansion and contraction when subjectedto heat .or cold. The looped portion 7 disposed near the burner tip and will be in the gas flame when the gas is flighted, and the expansion of the bar will move the end 18 toward the shoulder 11.

The telescoping extension 12 is adjusted when. the device is set up so that its end will .;be adjacent to the shoulder 11 or barely clear this shoulder so'that immediately after the gas is lighted and the thermostatic bar expands, theextension will move into the path of the shoulder and lock the arm in its open position, thus doing away with the necessity of fingers for any length of time after the gas is lighted. If the thermostatic bar .continuesto expand under the heat of the flame, as it usually will after the extension engages in the'extension without afiecting the other mechanism. When the bar contracts, the end of the extension 12 will contact with the depending portion 17 of the thermostatic bar andfurther movement of the extension in that direction will be prevented, while continued contraction of the thermostatic bar will be permitted through the sliding of the end 13 in the extension. I am thus able to adjust the device so that it will be extremely sensitive to the heat of the flame and operate to lock the valve armin its open position immediately upon the lighting of the gas Furthermore, the adjustable extension allows for variation in the distance between the ithermostatic bar and the valve lever,

rendering fine adjustment of the bar unnecessary when it is mounted on the burner.

When the lug 10 is released from its engagement with the extension, the spring 7 will raise the arm 6 andwith it the lever 5 and closethe valve. Should, however, it be desired to close the valve and shut ofi the gas while the thermostatic bar is expanded,

Lit is only necessary grasp. the lever 5 and holding the lever open with the the shoulder, the end 13 of the bar may slide rock it to its closed position independently of the spring-actuated arm 6.

I have shown this invention in connection with a gas tip, but it may be readily adapted for use with other styles of gas burners used for'heating as well as illuminating purposes.

In various ways the details of construction herein shown and described may be modified and still be within the scope of my invention.

I claim as my invention:

l. The combination, with a gas burner having a valve and a lever therefor, of an arm mounted for simultaneous movement with said lever when said valve is opened, said lever being free to move and close said valve independently of said arm, a spring put under tension by the opening of said valve for returning said lever and arm to their normal position when'said valve is open and released and the gas unlighted,

and a thermostaticbar comprising an upright member secured to said burner and having a loop formed therein at its upper end adjacent to the burner tip and pro vided with a depending portion for engaging said arm and temporarily locking it against the tension of said spring, said bar, when contracted, releasing said arm to permit it to return to its normal position and close said valve. f

2. The combination, with a burner, of a thermostatic bar comprising an upright member secured to said burner and positioned at one side thereof and having a loop formed at its upper end adjacent to the burner tip, said loop having a depending member terminating in a horizontal end portion, a valve forsaid burner,ran operating lever therefor, an arm having means in the path of said lever for operating said armwhen said lever is moved to an open position, a spring put under tension by the 'copies of this patent may be obtained for movement of said lever to an open position for normally returning said arm and lever to their closed position when released, and said arm being positioned to be engaged by the horizontal portion of said thermostatic bar and temporarily locked when said bar is expanded and released automatically when said bar is contracted.

The combination, with a gas burner having a valve and an operating lever therefor, of an arm loosely mounted on the stem of said valve in a plane parallel substantially with said lever said arm having a lug formed thereon projecting into the path of said lever for actuating said arm by the movement of said lever in one direction, a spring for yieldingly resisting movement of said arm, a thermostatic bar mounted adjacent to the burner tip and having a part to engage and lock said arm when said bar is expanded and said lever is in its open position, the contraction of said thermostatic bar releasing said arm to return said lover automatically to its closed position.

4-. The combination, with a burner and its valve, of a springactuated arm connected with said valve, a thermostatic bar having a portion arranged at an angle to said arm, means mounted on said angle portion and adjustable thereon and normally positioned adjacent to said arm to move into the path of the'same upon the expansion of said bar, a stop for checking the movement of said means away from said arm when said bar contracts, and said bar having freedom of expansion and contraction independently of said arm-engaging means.

In witness whereof, I have hereunto set my hand. this 26th day of March, 1915.

V JESSE G. STEENSON. lVitnesses:

GENEVIEVE E. SoRENsEN, EDWARD A. PAUL.

five cents each, by addressing the Commissioner of Patents, 7 Washington, D. G." 7 

